Thank you for the info. I am ALWAYS looking for deep pocket sheets to fit the bed and they "SAY" it will fit a certain depth but the first washing makes it too small and they ride up agin. Its a constant struggle! I have never tried doing it myself. I may have to call myself seamstress!

I've gotten my fold-over elastic at www.birchstreetclothing.com
Right now if you buy 3 you get 1 free. They have 5/8" and also 1". White, black and dyeable. Check it out. Great place to buy from. I've bought from them at quilt shows before too.

Dolly, thank you for those instructions. Where do you find the elastic like that? I have made baby crib sheets exactly like that. What a great idea for sheets for reg beds. Grandchildren would love them!

This is great. Thank you. I wish I had known this elastic years ago. I would like to add to it.
Years ago I worked at a knit fabric shop and we sold tricot fabric. It is 108” wide and makes the nicest sheets I ever had, but the heavier tricot was hard to get even then. I measured the mattress top+side+turn under the same as you, for top and bottom sheet. I cut the all corners out of the bottom sheet and the foot of the top sheet. I left the extra legend of the top sheet for a deep hem and inserted wide lace encased inside the fold back hem to give it more body and beauty. Then hem the sides of the top down to about 24” from the foot. Joined the top and bottom and about 24” up the sides of the foot. Then sew elastic all the way around the bottom sheet. The sheets are now one unit, very light weight, slick, and dry in no time. It is easy to put on and off as a unit.